Software Engineer, Cost Optimization (Infrastructure)

Kustomer Inc.

Job Overview

Location

US - New York, NY

Job Type

Full-time

Full Job Description

📋 Description

• Kustomer is the industry leading conversational CRM platform perfecting every customer experience. Built with intelligent tools such as AI and Automation, no code-configuration and a connected data platform that unifies data from multiple sources through a single timeline, Kustomer empowers businesses to operate with greater efficiency and deliver more personalized service to customers across any channel, making every interaction more meaningful and memorable.
• Kustomer is looking for an Infrastructure Engineer to own cost optimization across our cloud and AI infrastructure. This role is mostly focused on driving down our AWS/infra and AI token spend, while keeping an eye on the AI tooling ecosystem that powers our platform.
• As an Infrastructure Engineer, you will sit on our Foundation team, partnering closely with engineering leadership to find, prioritize, and execute cost-saving initiatives without sacrificing performance or reliability.
• You will own AWS cost optimization end-to-end: EC2 right-sizing, Reserved Instances/Savings Plans, spot usage, storage tiering, and unused resource cleanup.
• You will build dashboards and reporting to track infra spend by team/service, and flag anomalies before they become expensive.
• You will partner with engineering teams to identify and eliminate waste, think idle resources, over-provisioned instances, redundant environments.
• You will drive architectural decisions that balance cost, performance, and reliability.
• You will use Terraform to codify and enforce cost-conscious infrastructure standards.
• You will analyze and reduce AI/LLM token spend across our AI-native platform, model right-sizing, prompt efficiency, caching, and routing strategies.
• You will work with our Foundations team on developer tooling to build guardrails and observability around token usage.
• You will evaluate deterministic vs. generative tool selection tradeoffs from a cost lens, and recommend where cheaper approaches can do the same job.
• You will support Kustomer's AI capabilities (Architect, Concierge, Envoy) by keeping them performant and cost-efficient.
• You will report on cost trends and savings opportunities directly to engineering leadership.
• You will proactively identify systemic inefficiencies and build the tooling to keep them from creeping back.
• You will collaborate with FinOps/finance stakeholders to forecast and track spend against budget, while driving alignment across engineering teams that balances developer input without sacrificing speed and momentum.

🎯 Requirements

• Bachelor's degree in Computer Science, Computer Engineering, a relevant technical field, or equivalent practical experience
• 4+ years of experience with AWS infrastructure at scale, with a strong track record of driving down cloud costs
• Hands-on experience with AWS cost tools (Cost Explorer, Cost and Usage Reports, Trusted Advisor, etc.) and EC2 right-sizing/reservation strategies
• Proficiency with Terraform or other Infrastructure as Code tools, and a high-level programming language such as Go, Python, or JavaScript
• Familiarity with LLM/AI infrastructure cost drivers (token usage, model pricing, caching strategies) is a strong plus

🏖️ Benefits

• Competitive salaries and stock options
• 100% healthcare coverage, 401K, WiFi and Mobile reimbursement, and a generous vacation policy in the U.S.
• Pension, supplemental health insurance and other perks in the UK

Skills & Technologies

Python

JavaScript

React

Node.js

MongoDB

DevOps

Remote

Degree Required

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Kustomer Inc.

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About Kustomer Inc.

Kustomer Inc. provides cloud-based customer service software that unifies interactions, tickets, orders, and customer data into a single timeline. Agents access a 360-degree view, automation handles repetitive tasks, and AI delivers insights and suggested responses. The platform supports omnichannel communication across email, chat, social, voice, SMS, and WhatsApp, and offers CRM, workflow, and reporting tools for e-commerce, marketplaces, and digital-first brands.

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